Yeah, over the course of a season, Marvin will post better numbers. And the chemistry that Marvin and Peyton have is second to none. Just wait, Marvin will bust out with a huge game before the season is over.
I have both in different leagues, Harrison in a ppr and Wayne in non-ppr, and honestly apart from that huge game last week Wayne had been pretty quiet. Good but not great, while Marvin is the model of consistency, you don't have valleys with Marvin, just good production and a few break out games.
For this season, I'd rather have Marvin. Next year, Wayne may overtake him. They're production has gotten closer and closer each year and you know it's only a matter of time before Wayne becomes the true #1 in Indy. But for this year, Marvin will be the better receiver to have.